Brake-band-lining-drilling machine



Jan. 6, 1925. 1,522,461

' o.4 1 sMn-.H

BRAKE BANDLINING DRlLLYING MACHINE Filed April 19a 1925 Villllllnw` 4 l ATTORNEY Patented dan. 6, 1925.

UNITED 4STATES '1,522,461 PATENT. OFFICE..

OSCAR L. SMITH, OF RYDAL, PENNSYLVANIA, ASSIGNOR TO PENN RIVET CORPO-IRA- TION, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF VIRGINIA.

BRAKE-BAND-LINING-DRILLING MACHINE.

Application filed April 19, 1923. Serial No. 633,294.

T all 10710171.7125 may concern: y

Be it known that I, OSCAR L. SMITH, a

' citizen of the United, States, residing at-Rydal, in the county of Montgomery and State of Pennsylvania, have invented an Improvement in Brake-Band-LiningDrilling Maehines, of which the following description, in connection with the accompanying. drawings, is a specification, like character-son the drawings representing like parts.

" This invention relates to drilling` machines for drilling holes in work and vmore particularly to drilling machines for drilling .holes in brake. band linings registering with holes previously formed in the brake band itself.

In the practical use of brake bands for vehicles such as automobiles and the like, it is now thecommon practice to line the brake band with some material to frictionally grip the brake element with which it cooperates. In order that the brake band lining may be effectively secured to the brake band, 'it is now the common practice to secure the brake band lining to the brake band by rivets orbolts, and during thev manufacture of the brake band to providca series of holes for this purpose.

The bra-ke band lining, however, is now usually furnished in long strips and unprovided with holes for the boltsor rivets which "are to 'connect 'the lining with the brake band.

One of the objects of the present inven tion, therefore, is to provide a machine which shall. effectively and accurately form holes in the brake band lining registering with the previously formed holes` in the brake band itself.

Since the brake band has been previously .providedwith holes for the rivets or bolts, it

cally removed from its engagement with the hole in the brake band.

The various features of the invention and the novel combination of parts will best be made clearv from the following description and the accompanying drawings of one good form thereof'.

In'the drawings:

Fig. l is a perspective view of a drilling machine containing the' present invent-ion;

Fig. 2 is an enlarged sectional view longitudinally through the machine;

Fig. 3 is an enlarged cross-sectional View of the brake band and brake band lining with the hole in the brake band lining registering with the hole in the brake band.

While the primary purpose of the present invention is best made manifest in connection with the drilling of holes in a brake band lining registering with holes previously formed in the brake band itself, it is to be un'derstoodthat the machine of the present invention may be advantageously employed in connection with other work.

The machine frame 1 may be of a con struction to properly support the operating mechanism, and in the present instance is shown as a casting rising from aba'se 2 which maybe secured to abench or other supporting element. The machine frame l may be conveniently formed of a casting or castings between the sides of which some of the operating parts may be enclosed.

Extendinof fron. the machine frame l are the arms P"i2-having bearings 4 for the drill y shaft 5 which may he longitudinally movable in the bearings 4. Between the bearings 4 the drill shaft 5 is provided with a pulley 6 secured thereto by a set screw or like means 7 Mounted upon the machine frame .l is a stud or dead shaft S lcarrying the two rotating guides 9 about which pass a belt 10 which may be driven-from a suitable source of power. The location of the shaft 8 is' such that the belt 10 after passing about the guide pulleys. 9 may extend in substantially horizontal direct-ion about the pulley G, the eonstructionwbeing such that the drill shaft 5 will be given continuous rotary movement.

Secured to the drill shaft 5 is the brake band lining drill 11,7 the operating end portion 12 of which may be provided with suitable cutting portions shaped to provide the desired form' of hole or opening in the brake band lining. v

In the present instance the drill 1l is formed to provide an opening 1B in the brake band lining 14, having a widened face fit) l Ut) l Uf) portion as indicated` in Fig. .3, and a narrowing portion merging into the previously formed openings or hole in the brake band 16.

lVhere the source of power for driving the belt 10 is below the main frame ot the machine7 the guide pulleys 9-9 may be transferred to and supported upon. a cross or dead shaft 17, so that the periphery of the guide pulleys 9 whether supported on the shaft 8 or the shaft 17 will direct the driving belt 10 in a substantially horizontal direc-` tion about thepulley 6.

Iivotally supported at 18 on themachine l'rame is the drill advancing lever 19hav- -ing the frontw'ardly extending arm 20,

formed with a rest or stop 21 torlthe lower end o the drill shaft 5, and to insure that the drill shaft 5 shall be moved longitudinally in either direction positively, the lever A19 .is provided with the projecting biturcated arms 22 which engage a suitablev recess 23 in the lower en d portion of the drill shaft VIhearm 22zmay be secured to the lever in any suitable manner, as by the screw 2l. the construction being such that upon rocking movement of the lever 19 upon its pivotal support 18 the drill shat't 5 will be positively moved longitudinally.

Connected to the drill lever 19 at 25 is a downwardlyv extending rod 26 which may be appropriately connected to a treadle for manually rocking the drill lever 19- on its pivotal mounting.

Above the lever 19 and pivotally connected to the main i'rameot the machine at 2T is the iinder arm 28 which extends upwardly and is turned laterally at 29 to provide at 30 a holder for the finder or pilot 31 which may be secured in place by a set screw 32 which permits ladjustment of the linder 31 longitudinally.' 'A

Between the drill 'and finder, the present invention provides afixed support 33 vtor the worlf. In the present instance the support 33 is formed as au arm extendingfroni the machine frame and has a slot 34 through which the drill 11 may extend as the drill is advanced to perform its operating 'funetions. I

In case the brake band lining 1st is of the internal `type, as indicated in Fig. 1, the brake band and lining are sustained upon the supporting arm 33 with the openingof the brake band extending downwardly.-

as indicated in `Fig. 1. with the brake band lining facing the drill. Ii", however, the brake band lining is Vof the external type, the brake band and lining will be supported on the arm 33 -with the opening of the brake band extending upwardly about the finder.

In accordance with the present invention, the brake band is supported in fixed position to form the hole or opening in the brake hand lining, so that it will register with the 'previously formed opening or hole in the opening in the brake band in line with the F d rill, and as the` drill advances in a direction towards the work to form the hole or opening in the brake band lining, the finder is also automatically removed from its engagement with'the hole in -the brakeband, so that during the formation of the hole in the lining by the drill, the finder will not be injured by engagement with thev drill.

The ldrill lever 19 is provided with an up ward extension 35 having a toe portion 3G which, when the machine is at rest and the finder arm is in its raised or dotted line position, Fig. 2, bears against a shoulder portion `37 extending-downward vtrom the pivotal -support 27 of the finder arm. The engagement of the toe portion 36 with the shoulder portion 37 holds .the Ender 31 in the elevated position as long as the drill shaft 5 is depressed, so that the brake'band may be readily placed upon the supporting arm 33, and as the drill shaft is moved toward the brake band by the lever 19 the toe portion 36 moves in a clockwise direction and permits the finder arm to rock downwardly under its own weight `to bring the vFinder 31 into a hole 15 of the brake band.

ister with the hole 15.

'It is important that the drill 12 be prevented `from contacting with the finder 31, and the present invention therefore contemplates means for automatically withdrawing the finder 31 from the brake bands as the drill 12 performs its cutting operations. To this end the drill lever 19is provided with a lifter 38, extending, in the present instance, towards the front of the machine, and between the lifter 38 and the toe 3G the upward extension is recessed at 39 to permit the necessary movement of the shoulder 37 of thel finder arm. Extending downwardly from the finder arm 28 lis alug lor projection 40, which upon depression of the treadle to advance the drill into engagement with the work is engaged by the lifter 38 thereby positively and automatically moving the finder from its full to its.

dotted line position, Fig. 2, as the drill advances. v y

-In the present instance of the invention the projections 37 and 40 extending from the finderarm 28 are formed integrally with the, lifter arm, but this integral formation, oil course, is not essential, the requirements being that when the brake band and lining are placed upon the supporting arm 33, andthe foot treadle is depressed to advance the drill that the finder will lirst move into engagesie effected by lengagement of the lifter 38 on the drill lever 19 with the projection 40 on the finder arm.

The sequence of operations may be briefly stated as follows: The machine attendant places the brake band and brake band lining on the supporting arm 33 with the lining facing the drill. He then depresses the foot treadle to advance the drill, the initial eifect of which is to permit the finder to engage a hole previously formed in the brake band and aline said hole With the advancing drill. On further'depression of the treadle, however, the interengaging portions 3S'and 40 on the drill lever and finder arm cause the latter to be positively and automatically removed to Withdraw the finder 31 lfrom engagement with the hole in the -brakeband as the drill continues'its further advance, so that when thc drill is passing through the Work or lining of the brake band, the finder Will be removed from Contact with the drill and yet the Work will have been accurately positioned for the formation of the opening ory hole in the lining registering'with the corresponding opening or previously formed hole in the brake band.

To avoid any action of the drill on the previously formed opening l5 in the brake band, after the drill has formed the registering openingr in the brake band lining. the

prcsent'invention provides a stop 41 which may be formed as the head of an adjusting screw 49 to Contact withl the abutment 43 on the machine frame when the drill lever has advanced vthe drill its full operating stroke. The adjustable stop 4l adapts the machine for'operation upon brake linings of different thicknesses.

In some cases it may be desirable to provide the stop 44 for limiting the positioning movement of thefinder 31 and in the present Vinstance the stop 44 is formed as a pin secured transversely of the path of move ment of the shoulder 45 extending down- Wardly from the pivotal support 9.7 of the finder arm.

llVhat is claimed is:

1. In a machine for drilling brake bandv brakev band lining in register with holes l previously formed in the brake band, a nder located at the opposite sideof -tlie support, a rocking lever 4for moving the drill toward and from the brake band lining, and

means operable by the rocking movement of `the lever in the drill advancing direction to" move the finder into .position to lo'cate the,

Work for the drill and'thereafter upon a con- .tinued moving of the lever-in the same direction to Withdraw the finder from the Work.

2. In a machine for drilling brake band linings, thev combination of a support fo'r the brake band, a drill disposed at one side of said support for drilling holes in the 'brake band lining in register with holes pre viously formed inthe'brake band, a finder located at the opposite side of the support, means for moving the drill into cutting engagement with the brake band lining, and a finder supporting arm operable by said means to move the finder into position to locate the work as the drill approaches the vWork and operable to Withdraw the finder from the Work before the drill completes its advancing movement.

3. In a machine for drilling brake band linings, the combination of a support for the brake band, a drill disposed below the sup port for drilling holes in the brake band lining in register with holes previously formed in the brake band, a finder located above the support, means for moving the drill into cutting engagement with the brake band lining, and means actuated by the drill moving means for moving the nder into.

position to locate the Work as the drill approaches the Work and operable to Withdraw the finder from the work before the drill 'completes its advancing movement.

4.- In a machine for drilling brake band linings, they combination of a support for the brake band, a drill disposed at one side of Said support for drilling holes in the brake band lining in register with holes previously formed in the brake band, a finder located at the opposite side of the support, a lever for moving the drill :into cutting engagement with the brake band and for imparting its movement to the finder to move the latter into position to locate the work as the drill approaches the Work and to Withdraw the finder from the Work before the drill completes its advancing movement.

5. In a machine for drilling brake band linings, the combination of a drill for drilling holes in the brake band lining in register with holes previously formed in the brake band, a finder for engaging the holes in the brake band, a support for the brake band and lining between the finder and drill, a lever for advancing the drill toward the Work, a pivoted arm upon which the finder is mounted, 'cooperating projections upon the lever and arm for effecting movement of the Iinder into position to locate the Work as the drill approaches the work, and other cooperating projections upon the lever and arm for moving the finder away from the work asthe drill completes its advancing movement.

6. In a machine of the class described, the combination of a drill for drilling holes in the work in register with :other holes.v previously formed in another` part of the work,

means for advancing the drill to the Work, av iinder arm pivotall)7 mounted and having a vfinder which automatically engages one of the previously formed holes in the work as the drill is advanced towards the work, and means operated by the drill advancing means for automatically swinging the finder arm in a direction to withdraw the finder from engagement with the previously formed hole in-the work as the drill continues its further advance.

7. In a machine of the class described, the combination of a drill for drilling holes in a brake band lining in register Iwith holes previously formed inthe brake band, a drill lever Jfor advancing the drill, a iinder arm having a finder which automatically engages a hole in the brake band as the drill is advanced, and means between the drill lever and the iinder arm and operable by the former for automatically moving the linder 4 into position to locate the work as the drill approaches the work and for withdrawing the nder from the hole in the brake band as ,the drill continues its advancing movement. l

8. In a machine of the class described,the combination of a drill for drilling holes in the work in register with other holes prf:- viously formed in another part of the work,

-a rocking lever for advancing the drill to the work, a finder arm pivotally mounted and having a linder which automatically engages one of the previously formed holes in the work to position the work as the drill is advanced towards the work, cooperating elements upon the lever and hnder arm for ett'ecting movement of the finder to the work engaging position as the lever advances the drill towards its work, and other cooperating elements upon the lever and finder arm for moving the latter away from the work as the lever approaches the completion ot its drill feeding movement.

9. In a machine for drilling holes in a brake band lining, the combination of a drill for drilling-.holes in the brakev land lining lregistering with holes previously. formed in the brake band, means for rotating the' drill, means for advancing' the drill during its rotation, a finder arm having a tinder for automatically -engaging a hole previously formed in the brake band to position the work as the drill is advanced towards the brake band lining, drill and finder Tor supporting the brake band with the lining towards the drill, and means under the control of the drill advancing means for moving the I'lnder into cngagement withv the work and for automatically removing the inder'from engagement,` with the hole inthe brake band during the continued advance of-thedrill. g'

l0. In a drilling machine of thel class described, the combination of a drill for drilling holes in a brake bandI lining registering with holes previouslyformed in the brake band, a lever having an arm for advancing the drill, means for continuously rotating the drill, a finder arm having a finder Iwhich automatically engages a hole in the brake band in line with the drill as the drill is ai support between the advanced, a support for the brake band be tween. the drilland nder for supporting a brake band with the lining next to the drill, and interengaging connections between the drill advancing lever and the finder arm' for controlling the movement of the finder toward the work and for automatically withdrawing the finder from" its engagen'ient with-the hole-.in the brake band as the ,drill is further advanced.

11. In a machine for drilling holes in the linings of bralrefbands, the combination of a stationary support for the brake band,a drill 'movable' in a rectilinear path towards and into the brake band lining, means for advancing the drill, a finder pivoted upon the machine frame and automatically movable by the drill advancing means to engage a hole in the brake band as the drill is' advanced towards the work, and means automatically actuated by the drill advancing means for removing the linder from engagement with the hole in the brake band` before the drill completes its advancing movement. v

12. In a machine tordrilling brake band linings, the combination of a support for the brake band` a drill located at one side of the support for drilling holes in the brake band lining in register with holes previous` ly formed in the brake band. alfinder located at the opposite'side of said support, means for advancing the drillto act upon the brake band lining, and means'. operable by thel drill advancing means to .actuate the linderin locating the work' for the action of the drill.

13. AIn a machine for drilling brake band` linings, theA combination of a supportfor the brake band, a drill located at one side lll) of the support for drilling holes in -the' lthe finder from the Work .after the latter has been located.

14. In a machine for drilling brake band linings, the combination of a stationary sup port for the brake band, a drill located at one side of the stationary support for drilling holes in the brake band lining in register with holes previously formed in the brake band, means for advancing the drill to af-f upon the brake band lining, a finder, and l0 connections between the finder and drill advancing means for effecting movement of the finder into engagement with the Work on the stationary support as the drill is advanced. l5

Intestimony whereof, I have signed my name to this specification.

OSCAR L. SMITH. 

